Ian Nussbaum advises corporations and their boards of directors on mergers and acquisitions, takeover defense strategies, and other matters affecting corporate policy and strategy.

Mr. Nussbaum leverages extensive experience to advise major public and private companies, private equity firms, special committees, and investors across multiple industries on:

  • Mergers, acquisitions, sales, and divestitures
  • Joint ventures
  • Shareholder activism
  • Corporate governance
  • Conflict transactions
  • Takeover defense strategies 

A recognized leader in the field, he serves on the board of advisors at Penn Law’s Institute for Law & Economics. Mr. Nussbaum is active in various nonprofit organizations and serves on the 92Y’s Emerging Leadership Counsel.

Mr. Nussbaum’s experience includes representing:

Technology, Healthcare, and Life Sciences

  • Tableau in its US$15.7 billion sale to Salesforce*
  • Snap in multiple acquisitions worth over US$500 million in the aggregate*
  • Instacart in multiple transactions, including acquiring:
    • Rosie*
    • Eversight*
  • Five Prime Therapeutics in its US$1.9 billion sale to Amgen*
  • Portola Pharmaceuticals in its US$1.41 billion sale to Alexion Pharmaceuticals*
  • Sunrun in acquiring Vivint Solar in a stock deal valued at US$3.2 billion*
  • TiVo in its combination with Xperi in a US$3 billion all-stock transaction*
  • Zipwhip in its US$850 million sale to Twilio*
  • Accolade in multiple transactions, including its:
    • US$450 million acquisition of PlushCare*
    • US$460 million acquisition of 2nd MD*
  • Oyster Point Pharma in its US$415 million sale to Viatris*
  • Chimerix in divesting TEMBEXA to Emergent BioSolutions for US$238 million plus potential milestone payments*
  • Adamas Pharmaceuticals in its US$450 million sale to Supernus Pharmaceuticals*
  • Humio in its US$400 million sale to CrowdStrike*
  • Datadog in acquiring Sqreen*
  • Thirty Madison in its agreement to merge with Nurx*
  • Snyk in multiple transactions, including in acquiring:
    • TopCoat Data*
    • Fugue*
  • Instructure in its US$2 billion acquisition by Thoma Bravo*
  • Dova Pharmaceuticals in its US$915 million acquisition by Swedish Orphan Biovitrum*
  • Telaria in its merger of equals transaction with Rubicon Project*
  • Automattic in acquiring Tumblr from Verizon Communications*
  • Thomson Reuters in its strategic partnership with Blackstone for Thomson Reuters’ Financial and Risk business, valued at US$20 billion*
  • Medivation in its defense of a hostile takeover attempt by Sanofi and subsequent US$14 billion acquisition by Pfizer*
  • Expedia in its US$1.6 billion acquisition of Orbitz Worldwide*
  • Siris Capital Group in its US$4.4 billion all-cash acquisition of Travelport Worldwide*
  • Siris Capital Group in multiple transactions, including:
    • Its acquisition of Intralinks and the subsequent US$1.5 billion sale of the company to SS&C Technologies*
    • Its preferred investment in Synchronoss Technologies*
  • Fairchild Semiconductor International in its US$2.4 billion acquisition by ON Semiconductor*
  • MSD Capital in Dell Technologies’ US$22 billion recapitalization transaction*
  • Umpqua Holdings in selling a technology business to Kony*

Gaming and Leisure, Retail, Consumer Goods, Industrials, Utilities, and Automotive

  • IAA in its definitive merger agreement, under which Ritchie Bros. will acquire IAA in transaction valued at approximately US$7.3 billion*
  • Levi Strauss & Co. in acquiring Beyond Yoga*
  • Penn National Gaming in its US$575 million divestiture of four casinos to Boyd Gaming and US$2.8 billion acquisition of Pinnacle Entertainment*
  • Gaming and Leisure Properties in its US$5.1 billion acquisition of Pinnacle Entertainment’s real estate assets in a Morris Trust transaction*
  • PetSmart in its US$8.7 billion leveraged buyout by a private equity consortium led by BC Partners*
  • Dufry in multiple transactions, including its:
    • US$4 billion acquisition of World Duty Free*
    • US$1.5 billion acquisition of The Nuance Group*
  • PPG Industries in its US$29 billion offer to acquire AkzoNobel*
  • NextEra Energy in acquiring Gulf Power Company, Florida City Gas, and the Stanton and Oleander power plants from the Southern Company*
  • Johnson Controls in selling its automotive business to Visteon

Financial Institutions

  • Chubb in its US$28.3 billion acquisition by ACE Limited*
  • The Carlyle Group in multiple transactions, including in acquiring:
    • Interests in Duff & Phelps*
    • A controlling equity stake in Edgewood Partners Insurance Center*
  • CIT Group in its US$3.4 billion acquisition of OneWest Bank*
  • Wells Fargo in selling a division to Equiniti
  • The Bank of America in multiple transactions, including in:
    • 13 branch sales, with deposits worth about US$5.8 billion*
    • Selling its cash management business to BlackRock
  • PetSmart in its US$8.7 billion leveraged buyout by a private equity consortium led by BC Partners*
  • Astoria Financial in its US$2.2 billion acquisition by Sterling Bancorp*
  • Square 1 Financial in its US$849 million acquisition by PacWest Bancorp*
  • FBR & Co. in its US$160 million acquisition by B. Riley Financial*
  • B. Riley Financial in its US$67 million acquisition of Wunderlich Securities*

*Matter handled prior to joining Latham

Bar Qualification

  • California
  • New York


  • JD, University of Pennsylvania, 2012
    magna cum laude
  • BA, Columbia University, 2007
    magna cum laude